Mine didn't use to tilt at all (probably a setting I'd not found?), but whilst getting the Ad-Blue situation sorted (as per my above post) they've sorted it, so now it tilts every time
Re: the ad-blue problem, they found that it was too concentrated (i.e. it wasn't mixed at all) so they flushed it and filled up to the right mixture... Slightly annoyed that I bought the car directly from the dealer with this problem, but I'm told it's not a major deal so...